21325928

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^2\times {\mathrm{73}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 44491020

約数和(自身を除く): 23165092

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 73, 104, 106, 146, 212, 292, 424, 584, 689, 949, 1378, 1898, 2756, 2809, 3796, 3869, 5512, 5618, 7592, 7738, 11236, 15476, 22472, 30952, 36517, 50297, 73034, 100594, 146068, 201188, 205057, 292136, 402376, 410114, 820228, 1640456, 2665741, 5331482, 10662964, 21325928]

約数ペア:

[(1, 21325928), (2, 10662964), (4, 5331482), (8, 2665741), (13, 1640456), (26, 820228), (52, 410114), (53, 402376), (73, 292136), (104, 205057), (106, 201188), (146, 146068), (212, 100594), (292, 73034), (424, 50297), (584, 36517), (689, 30952), (949, 22472), (1378, 15476), (1898, 11236), (2756, 7738), (2809, 7592), (3796, 5618), (3869, 5512)]